him after a dramatic d to friday's mat, the brder investigfocuses on his older brother. 26-year-old tamerlan died in a shootout with police. last year, he traveled overseas to russia and chechnya and began linking to jihadist videos online. some wonder why he fell off the fbi's radar after they questioned him about possible terror ties two years ago. >> somehow, he got off the radar screen and traveled overseas to one of the most dangerous parts of the world. >> reporter: the bombings left three dead and dozens injured. many are still in the hospital. yesterday, boston remembered the victims and prayed for healing. >> forgiveness does not mean that we do not realize the heinousness of the crime. but, in our own hearts, when we're unable to forgive, we make ourselves a victim of our own hatred. >> reporter: and charges are expected to be filed soon in the case. john and diana? >> one big focus is the trip overseas to russia that the older brother took. have we learned anything else about that trip? >> reporter: well, we foe investigators are definitely focusing in on that. they feel that was